Printer s quoin



No Model.)

' o. AMUNDSON= PEINTEE'S QUOIN.

No. 528,756. Patented Nov; 6, 1894.

I ,1. I I

I I Z TNE NHRIS PETERS ca. momumo.. WASHINGTON o c therren STATES P TENT FFECEe OLUF ANDREVV AMUNDSON, OF CHICAGO, ILLINOIS.

PRINTERS QUOIN.

SPECIFICATION forming part of Letters Patent No. 528,756, datecl November 6, 1894:.

Application filed February 20,1894. Serial No. 500.856. (No model.)

To aZZ whom it may concern:

Be it known that I, OLUF ANDREW AMUND- SON, a citizen of the United States, residing at Chicago, in the county of Cook, State of Illinois, have invented a new and useful Improvement in Printers Quoins, of which the following is a specification.

The printers quoins now ordinarily in use are composed of two wedges which are fitted to each other and are provided with rack teeth on their adjacent faces, between which the printer insert-s his key which has teeth corresponding to that of a small pinion on its lower end which engages the teeth of the wedges and whereby by rotating the handle, the wedges are moved in relation to each other in looking or unlocking the`form. In connection with the quoins used in looking the form there are used a number of small blocks usually of Wood which are called the furniture. Ordinarily the quoins are inserted quite closely to each other around the periphery of the form to insure a good looking. As the wdges are moved in relation to each other it is evident they must slide on each other and one or both of them must slide on the furniture or the frame ot' the forn, or in other words must slide with relation to the fixed position of the form, and this sliding action takes place on the surface of least resistance, sometimes on the furniture and some;

times on the frame of .the form and sometimes on both of these surfaces. The frictional resistance of these surfaces varies considerably, so much so that the printer when he inserts his key and starts to lock the form does not know which wedge is going to move or in which direction the body of the quoin will move in looking, and he frequently finds that when the wedges are sufficientlyadj usted for looking purposes, they have traveled out of the position in which itis desired to make them lock, and frequently several unsuccessful attempts are made to lock the quoin in a certain position before the printer learns at which point he must insert the wedges at the commencement of the looking action in order to have them at the desired point on completion of their looking. The friction of the sliding action of the wedges in direct contact with the furniture produces strains tending to dislocate the form which is very objectionable, and some of the quoins previously in use have the hearing surfaces between the wedges so shallow or narrow and poorly fitted that the strains of looking at the lower edges of the wedges are different from those at the top edges of the wedges which has the result of causing the form to work loose when in use. 7 To overcome the above described difficulties and to make a quoin embodying the merits described and set forth heren are the objects of my invention.

The invention consists in the devices set forth in the claims hereof.

'Reference will be had to the acconpanying drawings, in which A Figure l is a perspective View of my quoin with the key inserted, and the wedges set to their full or greatest position of looking. Fig. 2 is a similar View in which the key is wanting and apart of the quoin casing is cut away to show one of the blocks which sepa rate the wedges, which wedges are here shown as being in position of the opposite extreme of that of. Fig. 1. Fig. 3 is a t'ransverse sectional View on line 3-3 of Fig. 1. Fig. 4 is a plan sectional view showing the position of the rack teeth of the wedges and the pinion of the key. Fig. 5 is a plan View of the quoin in section on line 5-5 of Fig. 3 which is the plane of the top surface of the wedges.

In the drawings A designates one of the wedges and A' designates the other wedge, and B the rack teeth on their adjacent faces.

D designates the hacking or casing for the wedge A, and E the hacking or casing for the In one or both edn'es of each wedge there is made a groove F, into which projections G of each hacking piece engage. This projection G is made by swaging downward into the grooves F a portion of the fianges of the backing pieces. In the end of each wedge there is a pin H, which prevents thewedge from being entirely withdrawn from thecasing. When the wedge is withdrawn to its full limit in relation to the casing, the pin H passes into aslot I in the end of the casing to permit the small end of the wedge to be withdrawn flush with the end of the casing. Between the wedges at each end of the cas- IOO ing, there are placed blocks J, which have of the wedges and hear against the outer ends of the rack teeth therehy separating the wedges from each other. Projections j' from the tops and bottoms of the blocks J engage Slots d in the flanges D' of the hacking D, wherehy the blocks J are held :in position.

The hacking pieces D and E are provided with flanges D' and E' which engage the tops and hottoms of the wedges and are fitted to each other in a manner that when placed in position to each other, the hlocks J and the wedges A and B inserted, they cannot then come apart and may be handled with impunity without displacing the parts from their position of use.

The above arrangement of the fitting of the fianges D' and E' to each other is thus The fiange E' hasa central projection e, provided with engaging points e' which are fitted into spaces (l of the flange D', which fiange D' is provided with engaging points (1 which interlock the points e', preventing the dislodgment of the projection e from the space (1 when the wedges and hlocks are in position which prevents the vertical movement of the hacking pieces in relation to each other. In the center of the projection e, of the fiange c' there is an aperture E into which the key K is inserted to move the wedges in a man ner well understood. The sides of the aperture E prevent the key from traveling with the wedges and hold t in constant position to the hacking pieces of the quoin, which is a desideratum.

If the operator places each wedge in the same corresponding position to the hacking before he inserts his key, the wedges will travel in looking to the same corresponding position in relation to each other and the hacking, which is a desideratum.

The friction al resistance of the travel of the wedges is always on the su-faces of the hacking pieces and the blocks J and is therefore uniform, and the operator-'hy use will accustom himself to the force required in setting the wedges so that he may regulate the desired locking strain on the form which cannot he arrived at with the old forms of quoin, owingto the constant variation of their frictional resistance on the different pieces of the furniture.

In handling and using this improved quoin, the operator has, as it were, but one piece to pick up and put in position, which greatly saves time, and he inserts it exactly at the point where the locking is desired, as it cannot shift its position by the action of the locking ot' the wedges, and in looking, no strains are produced to dislocate the furniture and the form, and as the hlocks J are of the full depth of the wedges, giving a Wide, clean and sharp hearing to the wedges, there can be no unequal strains between the tops and hottoms of the wedges, which are objectionahle as above described.

The hacking pieces D and E made in the form shown can be cheaply made by stamping from sheet metal, which is a desideratun.

What I claim is- 1. In a printefis quoin the comhinaton, of two wedges, of rack teeth on their adjacent faces, of a block or blocks inserted between said faces and hearing on the ends of said rack teeth for the purpose described.

2. In a printer-s quoin the comhinat on, of two wedges, of rack teeth on their adgacent faces, of a block inserted between said faces and hearing on the ends of said rack teeth for the purpose described, of hacking pieces on the hack of each wedge and connected to each other in a manner that the frictionalresistance of lockin g is taken up hy the hacking pieces and not transmitted to the furntu 'e of the form.

3. In a printefls quoin the comhination, of two wedges, of rack teeth on the adJacnt faces of said wedges, of a block or hlocks 1nterposed between the adjacent faces of said wedges, of hacking pieces for each wedgo which hacking pieces ngagc each other and the interposed wedges and hlock or hlocks therehy holding the same together for the purpose described.

4. In a printers quoin the combination, of two wedges, of blocks interposed between said wedges, of a hacking piece for each wedge, of means for preventing the entire separation of the wedges from the hacking pieces.

5. In a printers quoin the combination, of a wedge havingagroovein the length thereof, of a hacking piece having a point or points engaging said groove to hold said wedge in a desired position of sliding contact with said hacking suhstantially as shown.

6. In a printer s quoin the comhination, of two wedges, of a block or hlocks interposed between said wedges, of hacking pieces on the 'outer sides of said wedges, of means whereby each of said wedges may be made to travel in relation to the hacking pieces substantially as shown. i

7. In a printefls quoin the combination, of two wedges, of hlocks interposed between said wedges, of hacking pieces for each wedge, said hacking pieces connected to each other and connected to said interposed hlocks for the purpose of holding all together substantially as shown and described.

8. In a printe-s quoin the comhination, of two wedges, of a hacking en gaging said wedges and therehy holding said wedges in position to each other, of a groove F and a pin H in said wedges for the purpose of holding said wedges in position to said hacking and pre- Venting their entire detachment from said hackingsubstantially as shown and described.

In witness whereof I have hereunto subscrihed my name, on this 10th day of February,1894, in the presence of two witnesses.

OLUF ANDREVV AMUNDSON.

Witnesses:

A. D. RAUsTEAn, CHARLES H. GARD. 

